From: Steven Rostedt <rostedt@goodmis.org>
To: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
RT <linux-rt-users@vger.kernel.org>,
Clark Williams <clark@redhat.com>, John Kacur <jkacur@gmail.com>,
"Luis Claudio R. Goncalves" <lgoncalv@redhat.com>,
Joonsoo Kim <js1304@gmail.com>,
Glauber Costa <glommer@parallels.com>,
linux-mm@kvack.org, David Rientjes <rientjes@google.com>,
elezegarcia@gmail.com
Subject: Re: FIX [0/2] Slub hot path fixes
Date: Wed, 23 Jan 2013 16:55:56 -0500 [thread overview]
Message-ID: <1358978156.21576.129.camel@gandalf.local.home> (raw)
In-Reply-To: <0000013c695fbbe8-6a7f750f-4647-40b8-9ab3-f4fa5af8c382-000000@email.amazonses.com>
On Wed, 2013-01-23 at 21:45 +0000, Christoph Lameter wrote:
> These are patches to fix up the issues brought up by Steven Rostedt.
>
> I hoped to avoid the preempt disable for the tid retrieval but there is
> no per cpu atomic way to get a value from the per cpu area and also retrieve
> the pointer used in that operation. The pointer is necessary to fetch the
> related data from the per cpu structure. Without that we
> run into more issues with page pointer checks that can cause
> freelist corruption in slab_free().
Thanks for looking into this. Your can add my "Reported-by" tags to the
patches. Just because I like labels ;-)
-- Steve
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prev parent reply other threads:[~2013-01-23 21:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-23 21:45 Christoph Lameter
2013-01-23 21:55 ` Steven Rostedt [this message]
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